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A: Porcine digital flexor tendon loaded in mechanical testing bath. A tapping device is used to generate shear waves in the tendon. B: Ultrasound imaging is performed through an acoustic window and is used to track transverse tendon velocity for 0.5 mm long kernels (white boxes on ultrasound image, enlarged for clarity). C: Transverse tendon velocity measured during cyclic loading as waves are induced at 25 Hz. Vibration frequency increases with axial tendon loading.
